Author(s): YIN Na, WANG Ke
Pages: 6-9
Year: 2015 Issue:  4
Journal: China Filtration & Separation
Keyword:  ceramic membrane; ultrafiltration; MOFs nanocrystal; heavy metal wastewater;
Abstract: The specific effects of MOFs nanocrystals on ceramic membrane ultrafiltration process were studied in order to in?vestigate the feasibility of resourced treatment of heavy metal wastewater by coupling. MOFs nanocrystals suspension was ultrafil?trated by ceramic membrane, the effects of nanocrystals concentration, temperature, pressure, and pH on ceramic membrane ultra?filtration were investigated. The results showed that the MOFs nanocrystals in suspension can be rejected nearly 100%by the ce?ramic membrane, with a clarified permeate and a near-deionized water turbidity;When the nanocrystals concentration was 0.1 g/L, temperature 30℃, operating pressure 0.125 MPa, and pH 8, the permeate flux of the ceramic ultrafiltration membrane was the larg?est (about 438 L/m2·h) and the rejection was the best (99.99%). Therefore, ceramic ultrafiltration membrane can provide a good re?jection of MOFs nanocrystals. This study was to determine the feasibility of the technology of ceramic ultrafiltration membrane cou?pled with MOFs nanocrystals, and this technology can adsorb and separate valuable heavy metals from wastewater, create economic values, and realize the water recycling, so it has provided a new process for the resourced treatment of heavy metal wastewater.